/*
Theme Name: WordPress Tool Template
Theme URI: https://example.com/wordpress-tool-template
Author: Your Name
Author URI: https://example.com
Description: 一个基于 WordPress 的可扩展小工具模板，类似于 nicetool.net 风格，包含工具展示和文章模块
Version: 1.0.0
Requires at least: 5.9
Tested up to: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: wordpress-tool-template
Tags: tools, utilities, blog, modern, responsive

This theme, like WordPress, is licensed under the GPL.
Use it to make something cool, have fun, and share what you've learned.
*/

/* ===================================
   CSS Variables - Design System
   =================================== */
:root {
    /* 主色调 - 科技蓝 */
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-primary-light: #60a5fa;
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    
    /* 辅助色 */
    --color-secondary: #8b5cf6;
    --color-accent: #06b6d4;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    
    /* 中性色 */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    /* 文字色 */
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    --text-inverse: #ffffff;
    
    /* 边框 */
    --border-color: #e5e7eb;
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-2xl: 1.5rem;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
    
    /* 间距系统 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 字体 */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-family-heading: inherit;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* 过渡动画 */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* 容器最大宽度 */
    --container-max: 1280px;
}

/* ===================================
   基础重置
   =================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   布局容器
   =================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===================================
   头部导航
   =================================== */
.site-header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    gap: var(--spacing-xl);
}

.site-branding {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.site-logo-wrapper {
    display: flex;
    align-items: center;
}

.custom-logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: all var(--transition-base);
}

.custom-logo-link:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.custom-logo {
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
}

.site-logo {
    height: 40px;
    width: auto;
}

.site-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.site-title:hover {
    color: var(--color-primary-dark);
}

.main-navigation ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
    padding: 0;
}

.main-navigation a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
}

.main-navigation a:hover,
.main-navigation .current-menu-item a {
    color: var(--color-primary);
    background: var(--color-primary-50);
}

/* 下拉菜单样式 */
.main-navigation .menu-item-has-children {
    position: relative;
}

.main-navigation .dropdown-arrow {
    font-size: 0.75rem;
    margin-left: 0.25rem;
    opacity: 0.7;
}

.main-navigation .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-primary);
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-sm);
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: 1000;
    flex-direction: column;
    gap: 0;
}

.main-navigation .menu-item-has-children:hover .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.main-navigation .sub-menu li {
    display: block;
}

.main-navigation .sub-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    border-radius: var(--border-radius-md);
}

.main-navigation .sub-menu a:hover {
    background: var(--color-primary-50);
    color: var(--color-primary);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    margin: 5px 0;
    transition: var(--transition-base);
}

/* ===================================
   Hero 区域
   =================================== */
.hero-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--text-inverse);
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-description {
    font-size: var(--font-size-xl);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    opacity: 0.9;
}

.hero-search {
    max-width: 600px;
    margin: 0 auto;
}

.search-form {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--bg-primary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-2xl);
    box-shadow: var(--shadow-xl);
}

.search-input {
    flex: 1;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    outline: none;
}

.search-button {
    background: var(--color-primary);
    color: var(--text-inverse);
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-2xl);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.search-button:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===================================
   工具分类导航
   =================================== */
.categories-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

/* 6 个分类布局 - 1 排×6 个 */
.categories-grid-6 {
    grid-template-columns: repeat(6, 1fr);
    gap: var(--spacing-md);
}

@media (max-width: 1200px) {
    .categories-grid-6 {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .categories-grid-6 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 10 个分类布局 - 2 排×5 个 */
.categories-grid-10 {
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1200px) {
    .categories-grid-10 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .categories-grid-10 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.category-card {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.category-card:hover {
    background: var(--color-primary-50);
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.category-name {
    font-weight: 600;
    font-size: var(--font-size-sm);
}

/* ===================================
   工具列表
   =================================== */
.tools-section {
    padding: var(--spacing-2xl) 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

/* 6 个工具布局 - 1 排×6 个 */
.tools-grid-6 {
    grid-template-columns: repeat(6, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1200px) {
    .tools-grid-6 {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .tools-grid-6 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 8 个工具布局 - 2 排×4 个 */
.tools-grid-8 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

@media (max-width: 1200px) {
    .tools-grid-8 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .tools-grid-8 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 5 个工具布局 - 1 排×5 个 */
.tools-grid-5 {
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1200px) {
    .tools-grid-5 {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .tools-grid-5 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.tool-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    min-height: 240px;
    height: 100%;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.tool-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.tool-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary-50);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.tool-info {
    flex: 1;
    min-width: 0;
}

.tool-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.tool-category {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tool-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.tool-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.tool-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-warning);
}

/* ===================================
   文章展示模块
   =================================== */
.articles-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

/* 文章分类筛选 */
.articles-section .category-filter {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.articles-section .filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    align-items: center;
    margin: 0 auto;
}

.articles-section .article-filter-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-sm);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 2px solid transparent;
    border-radius: var(--border-radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
    min-height: 70px;
    cursor: pointer;
    font-size: var(--font-size-sm);
    width: 100%;
    max-width: 180px;
}

.articles-section .article-filter-btn:hover {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--text-inverse);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.2);
}

.articles-section .article-filter-btn.active {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--text-inverse);
    border-color: var(--color-primary);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.2);
}

.articles-section .filter-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-xs);
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.articles-section .article-filter-btn:hover .filter-icon,
.articles-section .article-filter-btn.active .filter-icon {
    background: rgba(255, 255, 255, 0.2);
}

.articles-section .article-filter-btn img {
    width: 24px;
    height: 24px;
    transition: all var(--transition-base);
}

.articles-section .filter-label {
    font-size: var(--font-size-xs);
    text-align: center;
    line-height: 1.2;
    max-width: 100%;
    word-wrap: break-word;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 6 个文章布局 - 1 排×6 个 */
.articles-grid-6 {
    grid-template-columns: repeat(6, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1200px) {
    .articles-grid-6 {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .articles-grid-6 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 4 个文章布局 - 1 排×4 个 */
.articles-grid-4 {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1400px) {
    .articles-grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .articles-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .articles-grid-4 {
        grid-template-columns: 1fr;
    }
}

.article-card {
    background: var(--bg-primary);
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
    min-width: 0;
    max-height: 360px;
    position: relative;
}

.article-card::before {
    content: none;
}

.article-card:hover {
    transform: translateY(-4px);
    border-color: #667eea;
    box-shadow: 0 12px 24px rgba(102, 126, 234, 0.15);
}

.article-thumbnail {
    width: 100%;
    height: 200px;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    background: transparent;
    display: block;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.article-card:hover .article-thumbnail {
    transform: scale(1.08);
}

.article-content {
    padding: 1rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 0.75rem;
}

.article-category {
    font-size: 0.6875rem;
    color: #667eea;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    display: inline-block;
    padding: 3px 8px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: 4px;
    width: fit-content;
    margin-bottom: 0.5rem;
}

.article-title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    min-height: 2.6em;
    max-height: 2.6em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.2s ease;
    margin: 0;
}

.article-card:hover .article-title {
    color: #667eea;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid #f3f4f6;
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.article-date,
.article-author {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    white-space: nowrap;
}

.article-date i,
.article-author i {
    font-size: 0.6875rem;
    color: #d1d5db;
}

/* ===================================
   统计数据模块
   =================================== */
.stats-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--text-inverse);
    padding: var(--spacing-3xl) 0;
    margin-top: var(--spacing-2xl);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.stat-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    backdrop-filter: blur(10px);
}

.stat-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-base);
    opacity: 0.9;
}

/* ===================================
   页脚
   =================================== */
.site-footer {
    background: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    color: #ffffff;
    padding: 1.5rem 0 0;
    margin-top: 3rem;
}

.site-footer .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 页脚主要内容 */
.footer-main {
    padding: 1.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

/* 页脚小工具 */
.footer-widget {
    margin-bottom: 1rem;
}

.footer-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-title i {
    color: #667eea;
}

/* 关于我们 */
.footer-about-content p {
    font-size: 0.875rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.75rem;
}

.footer-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.stat-number i {
    font-size: 1.25rem;
}

.stat-label {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
}

/* 页脚导航 */
.footer-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-nav li {
    margin-bottom: 0.4rem;
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.footer-nav a i {
    font-size: 0.875rem;
    color: #667eea;
    width: 1rem;
}

.footer-nav a:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}

.footer-nav a:hover i {
    color: #ffffff;
}

/* 标签云 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tag-cloud-link {
    display: inline-block;
    padding: 0.3rem 0.6rem;
    background: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    border-radius: 1rem;
    font-size: 0.75rem;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tag-cloud-link:hover {
    background: #667eea;
    color: #ffffff;
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* 友情链接 */
.footer-friend-links {
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.friend-links-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.friend-links-title i {
    color: #667eea;
}

.friend-links-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.friend-links-list a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    padding: 0.4rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 0.5rem;
    font-size: 0.8125rem;
    transition: all 0.3s ease;
}

.friend-links-list a:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* 底部信息 */
.footer-bottom {
    padding: 0.75rem 0;
}

.bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.copyright-module {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.right-section {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.footer-slogan {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.footer-slogan i {
    color: #ef4444;
    animation: heartbeat 1.5s ease-in-out infinite;
}

.copyright {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
    margin: 0 0 0.4rem 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.copyright a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
}

.copyright a:hover {
    color: #ffffff;
    text-decoration: underline;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

/* 社交媒体链接 */
.social-links {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.social-link {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0.08) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 1.25rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.social-link:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.5);
    border-color: rgba(255, 255, 255, 0.3);
}

.social-link i {
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3));
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: -60px;
    right: 2rem;
    width: auto;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    border: none;
    border-radius: 25px;
    padding: 0 1.5rem;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
}

.back-to-top.visible {
    bottom: 2rem;
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

.back-to-top i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.back-to-top:hover i {
    transform: translateY(-3px);
}

/* 页脚响应式设计 */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .back-to-top {
        right: 1rem;
        bottom: -60px;
    }
    
    .back-to-top.visible {
        bottom: 1rem;
    }
}

@media (max-width: 768px) {
    .site-footer {
        padding: 2rem 0 0;
        margin-top: 3rem;
    }
    
    .site-footer .container {
        padding: 0 1.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding-bottom: 2rem;
    }
    
    .footer-title {
        font-size: 1rem;
        margin-bottom: 1rem;
    }
    
    .bottom-content {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
    
    .copyright-module {
        text-align: center;
        width: 100%;
        align-items: center;
    }
    
    .copyright {
        justify-content: center;
    }
    
    .footer-slogan {
        justify-content: center;
    }
    
    .right-section {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        width: 100%;
    }
    
    .footer-slogan {
        justify-content: center;
        width: 100%;
    }
    
    .social-links {
        justify-content: center;
        width: 100%;
    }
    
    .back-to-top {
        right: 50%;
        transform: translateX(50%);
        padding: 0 1.25rem;
    }
    
    .back-to-top.visible {
        right: 50%;
        transform: translateX(50%);
    }
}

@media (max-width: 480px) {
    .footer-stats {
        grid-template-columns: 1fr;
    }
    
    .friend-links-list {
        gap: 0.5rem;
    }
    
    .friend-links-list a {
        padding: 0.375rem 0.75rem;
        font-size: 0.8125rem;
    }
    
    .back-to-top span {
        display: none;
    }
    
    .back-to-top {
        width: 50px;
        height: 50px;
        padding: 0;
        border-radius: 50%;
        justify-content: center;
    }
    
    .back-to-top i {
        font-size: 1.25rem;
    }
}
}

/* ===================================
   响应式设计
   =================================== */
@media (max-width: 1200px) {
    .articles-section .filter-buttons {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .articles-section .filter-buttons {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .main-navigation ul {
        display: none;
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 100%;
        left: 0;
        background: var(--bg-primary);
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }
    
    .main-navigation.toggled ul {
        display: flex;
    }
    
    .hero-section {
        padding: var(--spacing-2xl) 0;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
    
    .articles-section .filter-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .articles-section .article-filter-btn {
        min-height: 60px;
        padding: var(--spacing-sm) var(--spacing-xs);
    }
    
    .articles-section .filter-icon {
        width: 24px;
        height: 24px;
    }
    
    .articles-section .filter-label {
        font-size: 0.625rem;
    }
}

/* ===================================
   通用工具类
   =================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

/* ===================================
   WordPress 核心样式兼容
   =================================== */
.aligncenter {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.alignleft {
    float: left;
    margin-right: var(--spacing-md);
}

.alignright {
    float: right;
    margin-left: var(--spacing-md);
}

.wp-caption {
    max-width: 100%;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

/* ===================================
   加载状态
   =================================== */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-gray-200) 25%,
        var(--color-gray-100) 50%,
        var(--color-gray-200) 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ===================================
   按钮样式
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-sm);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--text-inverse);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--color-gray-300);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--text-inverse);
}

/* ===================================
   工具图标 Font Awesome 支持
   =================================== */
.tool-icon i.fa,
.tool-icon i.fas,
.tool-icon i.far,
.tool-icon i.fab {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.tool-icon-large i.fa,
.tool-icon-large i.fas,
.tool-icon-large i.far,
.tool-icon-large i.fab {
    color: var(--color-primary);
}

/* 工具卡片图标容器中的 <i> 标签样式 */
.tool-header .tool-icon i {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===================================
   联系表单样式优化
   =================================== */
.contact-form-container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-2xl);
    background: var(--bg-primary);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
}

.contact-form-container h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    text-align: center;
}

/* Contact Form 7 样式 */
.wpcf7-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.wpcf7-form p {
    margin: 0;
}

.wpcf7-form label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.wpcf7-form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
    background: var(--bg-primary);
}

.wpcf7-form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-50);
    transform: translateY(-1px);
}

.wpcf7-form-control.wpcf7-textarea {
    min-height: 150px;
    resize: vertical;
}

.wpcf7-submit {
    background: var(--color-primary);
    color: var(--text-inverse);
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-top: var(--spacing-sm);
}

.wpcf7-submit:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.wpcf7-submit:active {
    transform: translateY(0);
}

/* 错误和成功消息 */
.wpcf7-response-output {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    text-align: center;
    font-weight: 500;
}

.wpcf7-response-output.wpcf7-mail-sent-ok {
    background: var(--color-success);
    color: var(--text-inverse);
}

.wpcf7-response-output.wpcf7-validation-errors {
    background: var(--color-danger);
    color: var(--text-inverse);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .contact-form-container {
        padding: var(--spacing-xl);
        margin: 0 var(--spacing-md);
    }
    
    .wpcf7-form {
        gap: var(--spacing-md);
    }
    
    .wpcf7-form-control {
        padding: var(--spacing-sm);
    }
    
    .wpcf7-submit {
        padding: var(--spacing-sm) var(--spacing-lg);
    }
}

/* 页面特定样式 */
.page-id-888 .entry-content {
    max-width: 800px;
    margin: 0 auto;
}

.page-id-888 .entry-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}